/* main source codes // Cloth.hx import js.Browser; import muun.la.Vec3; import pot.core.App; import pot.graphics.Graphics; class Cloth extends App { var g:Graphics; var w:World; var left:Vertex; var right:Vertex; var pressedBall:Bool = false; final pressed:Vec3 = Vec3.zero; final diff:Vec3 = Vec3.zero; final cam:Vec3 = Vec3.zero; final look:Vec3 = Vec3.zero; final ballTarget:Vec3 = Vec3.zero; override function setup():Void { pot.frameRate(Fixed(60)); input.scalingMode = Screen; g = new Graphics(canvas); g.init3D(); initSim(); pot.start(); } override function resized() { g.screen(pot.width, pot.height); } function initSim():Void { w = new World(); w.ball.p.z = 2.5; w.ball.p.y = -1; ballTarget.assign(w.ball.p); w.ballRadius = 1; final n = 30; final vs = addMesh(Vec3.of(0, 1.5, 0), n); left = vs[0][0]; right = vs[n - 1][0]; } inline function toWorld(mx:Float, my:Float):Vec3 { final pos = g.screenToWorld(Vec3.of(mx / pot.width * 2 - 1, 1 - my / pot.height * 2, 0)); pos -= cam; pos *= (0.0 - cam.y) / pos.y; pos += cam; return pos; } override function update():Void { cam.set(-2, 3, 6); look.set(0, World.FLOOR * 0.6, 0); final scale = Math.min(1, pot.width * 1.3 / pot.height); cam.assign(look + (cam - look) / scale); final dragging = pressed.copy(); var dpress = 0; if (input.touches.length > 0) { final touch = input.touches[0]; dpress = touch.dtouching; if (dpress == 1) { pressed.assign(toWorld(touch.x, touch.y)); } if (touch.touching) { dragging.assign(toWorld(touch.x, touch.y)); } } else { final mouse = input.mouse; dpress = mouse.dleft; if (dpress == 1) { pressed.assign(toWorld(mouse.x, mouse.y)); } if (mouse.left) { dragging.assign(toWorld(mouse.x, mouse.y)); } } if (dpress == 1) { var ballHit = false; final p = w.ball.p - cam; final d = (pressed - cam).normalized(); final B = -p.dot(d); final C = p.dot(p) - w.ballRadius * w.ballRadius; final D = B * B - C; if (D > 0) { final t = -B - Math.sqrt(D); if (t > 0) { ballHit = true; } } pressedBall = ballHit; } if (dpress == -1) { pressedBall = false; } final diffTarget = dragging - pressed; if (pressedBall) { diffTarget.setZero(); final height = ballTarget.y; ballTarget.assign(dragging - cam); ballTarget *= (height - cam.y) / ballTarget.y; ballTarget += cam; } diff += (diffTarget - diff) * 0.1; final MAX_LENGTH = 1.0; final length = diff.length; if (length > MAX_LENGTH) diff *= MAX_LENGTH / length; w.wind.x = diff.x * 0.2; w.wind.z = diff.z * 0.2; w.ball.p += (ballTarget - w.ball.p) * 0.2; w.update(); } override function draw():Void { g.camera(cam.x, cam.y, cam.z, look.x, look.y, look.z, 0, 1, 0); g.inScene(() -> { g.clear(0.2, 0.2, 0.2); w.draw(g); g.lights(); g.specular(0.2); g.color(0.8, 0.8, 0.8); g.pushMatrix(); g.translate(w.ball.p.x, w.ball.p.y, w.ball.p.z); g.sphere(w.ballRadius); g.resetMaterial(); g.popMatrix(); g.noLights(); g.color(0, 0, 0); g.pushMatrix(); g.translate(w.ball.p.x, World.FLOOR, w.ball.p.z); g.scale(1, 0, 1); g.sphere(w.ballRadius); g.popMatrix(); g.noLights(); g.color(1, 0, 0); drawArrow(); g.color(0, 0, 0); g.translate(0, World.FLOOR, 0); g.scale(1, 0, 1); drawArrow(); }); } function drawArrow():Void { g.pushMatrix(); g.translate(pressed.x, pressed.y, pressed.z); final len = diff.length; final width = len * 0.1; g.rotateY(Math.atan2(-diff.z, diff.x)); g.translate(len * 0.5, 0, 0); g.box(len, 0, width); g.translate(len * 0.5 + width * 0.5, 0, 0); final size = len * 0.25; g.triangle(0, 0, 0, -size, 0, -size, -size, 0, size); g.popMatrix(); } inline function addMesh(p:Vec3, n:Int, fixSides:Bool = true, vertical:Bool = false):Array> { final vs = []; final size = Vertex.INTERVAL * 0.5; final off = (n - 1) * 0.5; for (i in 0...n) { vs.push([]); for (j in 0...n) { final x = (i - off) * size; final z = j * size; final pos = p + Vec3.of(x, 0, z); final dist = Math.min(j + i, j + (n - 1 - i)); final v = w.createVertex(pos, !fixSides ? 1 : dist == 0 ? 0 : dist == 1 ? 0.3 : dist == 2 ? 0.6 : 1); vs[i].push(v); v.edge = i == 0 || i == n - 1 || j == 0 || j == n - 1; // noise v.v.y += v.invM * (Math.random() - 0.5) * 0.1; } } for (i in 0...n) { for (j in 0...n) { if (i > 0) { w.ss.push(new Spring(vs[i][j], vs[i - 1][j])); } if (j > 0) { w.ss.push(new Spring(vs[i][j], vs[i][j - 1])); } if (i > 0 && j > 0) { w.ss.push(new Spring(vs[i][j], vs[i - 1][j - 1])); } if (i > 0 && j < n - 1) { w.ss.push(new Spring(vs[i][j], vs[i - 1][j + 1])); } if (i > 1) { w.ss.push(new Spring(vs[i][j], vs[i - 2][j], 1)); } if (j > 1) { w.ss.push(new Spring(vs[i][j], vs[i][j - 2], 1)); } if (i > 0 && j > 0) { w.quads.push([vs[i - 1][j - 1], vs[i - 1][j], vs[i][j], vs[i][j - 1]]); } } } for (vv in vs) { for (v in vv) { v.p.x = (v.p.x - p.x) * 0.75; if (vertical) { final diff = v.p - p; diff.set(diff.x, diff.z, diff.y); v.p.assign(diff + p); } } } return vs; } static function main() { new Cloth(cast Browser.document.getElementById("canvas")); } } // Contact.hx import muun.la.Vec3; class Contact { public var v1:Vertex = null; public var v2:Vertex = null; public var minDist:Float = 0; public function new() { } public function init(v1:Vertex, v2:Vertex, minDist:Float):Void { this.v1 = v1; this.v2 = v2; this.minDist = minDist; } public function solve():Void { final p1 = v1.p + v1.v; final p2 = v2.p + v2.v; var mass = 1 / (v1.invM + v2.invM); final d = p2 - p1; final dist = d.length; final diff = dist - this.minDist; if (diff < 0) { var n = d.normalized(); final p = diff * mass; final imp = n * p; v1.v += imp * v1.invM; v2.v -= imp * v2.invM; } } } // Grid.hx import haxe.ds.Vector; class Grid { public static inline final HASH_SHIFT:Int = 16; public static inline final HASH_SIZE:Int = 1 << HASH_SHIFT; public static inline final HASH_MASK:Int = HASH_SIZE - 1; final times:Vector = new Vector(HASH_SIZE); final firsts:Vector = new Vector(HASH_SIZE); final nexts:Array = []; var time:Int = 0; public function new() { for (i in 0...HASH_SIZE) { times[i] = 0; firsts[i] = VertexIndex.NULL; } } public function add():VertexIndex { var i = nexts.length; nexts.push(VertexIndex.NULL); return new VertexIndex(i); } public function clear():Void { time++; } extern public inline function getIndex(gx:Int, gy:Int, gz:Int):GridIndex { var hash = 17; hash = (hash << 5) - hash + gx; hash = (hash << 5) - hash + gy; hash = (hash << 5) - hash + gz; return new GridIndex(hash & HASH_MASK); } extern public inline function register(vi:VertexIndex, gi:GridIndex):Void { if (times[gi] != time) { times[gi] = time; firsts[gi] = VertexIndex.NULL; } nexts[vi] = firsts[gi]; firsts[gi] = vi; } extern public inline function forEach(gi:GridIndex, f:(vi:VertexIndex) -> Void):Void { if (times[gi] != time) return; var vi = firsts[gi]; while (vi != VertexIndex.NULL) { f(vi); vi = nexts[vi]; } } } // GridIndex.hx abstract GridIndex(Int) to Int { public static final NULL:GridIndex = new GridIndex(-1); @:allow(Grid) inline function new(index:Int) { this = index; } } // Spring.hx import muun.la.Vec3; class Spring { public final v1:Vertex; public final v2:Vertex; public var len:Float; public var cfmRatio:Float; public var imp:Float = 0; public function new(v1:Vertex, v2:Vertex, cfmRatio:Float = 0) { this.v1 = v1; this.v2 = v2; this.cfmRatio = cfmRatio; len = (v1.p - v2.p).length; } public function preSolve():Void { imp = 0; } public function solve():Void { final p1 = v1.p + v1.v; final p2 = v2.p + v2.v; final cfm = cfmRatio * (v1.invM + v2.invM); final mass = 1 / (v1.invM + v2.invM + cfm); final d = p2 - p1; final dist = d.length; final n = d / (dist == 0 ? 1 : dist); final diff = dist - len - cfm * this.imp; final p = diff * mass * 1.4; final imp = n * p; v1.v += imp * v1.invM; v2.v -= imp * v2.invM; this.imp += p; } } // Vertex.hx import muun.la.Vec3; class Vertex { public static inline final INTERVAL:Float = 0.3; public static inline final INTERVAL2:Float = INTERVAL * INTERVAL; public static inline final INV_INTERVAL:Float = 1 / INTERVAL; public static inline final AIR_DRAG_COEFF:Float = 0.05; public static inline final LIFT_COEFF:Float = 0.005; public final initialPos:Vec3; public final p:Vec3; public final v:Vec3 = Vec3.zero; public var invM:Float; public var vi:VertexIndex; public var gx:Int = -1; public var gy:Int = -1; public var gz:Int = -1; public var gi:GridIndex; public final n:Vec3 = Vec3.zero; public var edge:Bool = false; @:allow(World) function new(p:Vec3, invM:Float, vi:VertexIndex) { this.initialPos = p.copy(); this.p = p.copy(); this.invM = invM; this.vi = vi; } public function update():Void { p += v; } public inline function applyAerodynamics(wind:Vec3):Void { v -= wind; final dot = Math.abs(v.normalized().dot(n)); v *= 1 - dot * AIR_DRAG_COEFF; v += wind; v.y += LIFT_COEFF * wind.length; } } // VertexIndex.hx abstract VertexIndex(Int) to Int { public static final NULL:VertexIndex = new VertexIndex(-1); @:allow(Grid) inline function new(index:Int) { this = index; } } // World.hx import muun.la.Vec3; import pot.graphics.Graphics; class World { public static inline final FLOOR:Float = -4.0; public final vs:Array = []; public final ss:Array = []; public final quads:Array> = []; final tries:Array> = []; final cs:Array = []; var numC:Int = 0; public final gravity:Vec3 = Vec3.zero; public final wind:Vec3 = Vec3.zero; public final ball:Vertex = new Vertex(Vec3.zero, 0, VertexIndex.NULL); public var ballRadius:Float = 0; final grid:Grid = new Grid(); public function new() { gravity.y = -0.002; } public function update():Void { substep(); substep(); } function substep():Void { for (v in vs) { if (v.invM > 0) { v.v += gravity; v.applyAerodynamics(wind); } } updateNormal(); collision(); for (s in ss) { s.preSolve(); } final iter = 3; for (t in 0...iter) { for (i in 0...numC) { cs[i].solve(); } for (s in ss) { s.solve(); } } for (v in vs) { v.update(); } } function updateNormal():Void { for (v in vs) { v.n.setZero(); } for (q in quads) { final v1 = q[0]; final v2 = q[1]; final v3 = q[2]; final v4 = q[3]; final p13 = v3.p - v1.p; final p24 = v4.p - v2.p; final normal = p13.cross(p24).normalized(); v1.n += normal; v2.n += normal; v3.n += normal; v4.n += normal; } for (v in vs) { v.n.normalize(); } tries.resize(0); for (q in quads) { final v1 = q[0]; final v2 = q[1]; final v3 = q[2]; final v4 = q[3]; final d13 = v1.n.dot(v3.n); final d24 = v2.n.dot(v4.n); if (d13 > d24) { // [1, 2, 3], [1, 3, 4] tries.push([v1, v2, v3]); tries.push([v1, v3, v4]); } else { // [1, 2, 4], [2, 3, 4] tries.push([v1, v2, v4]); tries.push([v2, v3, v4]); } } for (v in vs) { v.n.setZero(); } for (t in tries) { final v1 = t[0]; final v2 = t[1]; final v3 = t[2]; final p1 = v1.p; final p2 = v2.p; final p3 = v3.p; final p12 = p2 - p1; final p13 = p3 - p1; final normal = p12.cross(p13).normalized(); v1.n += normal; v2.n += normal; v3.n += normal; } for (v in vs) { v.n.normalize(); } } public function createVertex(p:Vec3, invM:Float = 1):Vertex { var v = new Vertex(p, invM, grid.add()); vs.push(v); return v; } function collision():Void { numC = 0; grid.clear(); for (v in vs) { final p = v.p; final ip = v.initialPos; final gx = Math.floor(p.x * Vertex.INV_INTERVAL); final gy = Math.floor(p.y * Vertex.INV_INTERVAL); final gz = Math.floor(p.z * Vertex.INV_INTERVAL); for (x in gx - 1...gx + 2) { for (y in gy - 1...gy + 2) { for (z in gz - 1...gz + 2) { final gi = grid.getIndex(x, y, z); grid.forEach(gi, vi -> { final v2 = vs[vi]; final d2 = v2.initialPos - ip; if (d2.dot(d2) < Vertex.INTERVAL2 * 3) return; final d = v2.p - p; if (d.dot(d) > Vertex.INTERVAL2) return; if (v.invM == 0 && v2.invM == 0) return; nextContact().init(v, v2, Vertex.INTERVAL * 0.75); }); } } } v.gx = gx; v.gy = gy; v.gz = gz; v.gi = grid.getIndex(gx, gy, gz); grid.register(v.vi, v.gi); if (v.invM == 0) continue; final dist = (ball.p - v.p).length; if (dist < ballRadius + 0.05) { nextContact().init(ball, v, ballRadius + 0.05); // fake friction final normal = (v.p - ball.p).normalized(); v.v -= (v.v - normal * normal.dot(v.v)) * 0.3; } } } inline function nextContact():Contact { if (cs.length == numC) { cs.push(new Contact()); } return cs[numC++]; } extern inline function drawTriangle(g:Graphics, v1:Vertex, v2:Vertex, v3:Vertex):Void { final p1 = v1.p; final p2 = v2.p; final p3 = v3.p; final n1 = v1.n; final n2 = v2.n; final n3 = v3.n; g.normal(n1.x, n1.y, n1.z); g.vertex(p1.x, p1.y, p1.z); g.normal(n2.x, n2.y, n2.z); g.vertex(p2.x, p2.y, p2.z); g.normal(n3.x, n3.y, n3.z); g.vertex(p3.x, p3.y, p3.z); g.normal(-n1.x, -n1.y, -n1.z); g.vertex(p1.x, p1.y, p1.z); g.normal(-n3.x, -n3.y, -n3.z); g.vertex(p3.x, p3.y, p3.z); g.normal(-n2.x, -n2.y, -n2.z); g.vertex(p2.x, p2.y, p2.z); } extern inline function drawShadow(g:Graphics, p1:Vec3, p2:Vec3, p3:Vec3):Void { g.vertex(p1.x, FLOOR, p1.z); g.vertex(p2.x, FLOOR, p2.z); g.vertex(p3.x, FLOOR, p3.z); g.vertex(p1.x, FLOOR, p1.z); g.vertex(p3.x, FLOOR, p3.z); g.vertex(p2.x, FLOOR, p2.z); } public function draw(g:Graphics):Void { var wireframe = false; if (wireframe) { g.noLights(); g.beginShape(Lines); g.color(1, 1, 1); for (t in tries) { final p1 = t[0].p; final p2 = t[1].p; final p3 = t[2].p; g.vertex(p1.x, p1.y, p1.z); g.vertex(p2.x, p2.y, p2.z); g.vertex(p2.x, p2.y, p2.z); g.vertex(p3.x, p3.y, p3.z); g.vertex(p3.x, p3.y, p3.z); g.vertex(p1.x, p1.y, p1.z); } g.endShape(); } else { g.lights(); g.beginShape(Triangles); g.specular(0.5); var i = 0; final n = Math.round(Math.sqrt(quads.length)); for (t in tries) { final row = (i >> 1) % n; final col = Std.int((i >> 1) / n); if (((row >> 1) ^ (col >> 1)) & 1 == 0) g.color(1, 1, 1); else g.color(0.4, 0.4, 0.4); final v1 = t[0]; final v2 = t[1]; final v3 = t[2]; drawTriangle(g, v1, v2, v3); i++; } g.endShape(); g.resetMaterial(); } g.noLights(); g.beginShape(Triangles); g.color(0, 0, 0); for (t in tries) { final p1 = t[0].p; final p2 = t[1].p; final p3 = t[2].p; drawShadow(g, p1, p2, p3); } g.endShape(); } } */ // compiled code function fa(m){var n=0;return function(){return n>>0)+"_",C=0;return n}); ab("Symbol.iterator",function(m){if(m)return m;m=Symbol("Symbol.iterator");for(var n="Array Int8Array Uint8Array Uint8ClampedArray Int16Array Uint16Array Int32Array Uint32Array Float32Array Float64Array".split(" "),p=0;pp&&(p=Math.max(p+C,0));pa;){var c=a++;this.l[c]=0;this.h[c]=pa.h}}function za(){this.l=0;this.h=this.i=null}function da(a,c,b,e){ba.h=!0;var f=ba.call(this)||this;ba.h=!1;f.A(a,c,b,e);return f}function ba(a,c,b,e){ba.h||this.A(a,c,b,e)}function Aa(){return na.h(this,"")}function Da(a,c){if(null==c)return null;null==c.Wa&&(c.Wa=m.kb++);var b;null==a.Za?a.Za={}:b=a.Za[c.Wa];null==b&&(b=c.bind(a),a.Za[c.Wa]=b);return b}var Ha=Ha||{},Ia;ba.prototype.A=function(a,c,b,e){null==e&&(e=!0);null==b&&(b=!0);null== c&&(c=Ba.lb);this.canvas=a;this.i=new la(this,a);switch(c.ra){case 0:this.input=new M(a,this.i,a,b,e);break;case 1:this.input=new M(a,this.i,window.document.documentElement,b,e);break;case 2:this.input=null}this.jc=-1;this.T();this.i.v()};ba.prototype.hb=function(){};ba.prototype.T=function(){};ba.prototype.update=function(){};ba.prototype.ma=function(){};ba.I=!0;Sb(da,ba);da.prototype.A=function(a,c,b,e){this.o=new T(0,0,0);this.v=new T(0,0,0);this.h=new T(0,0,0);this.l=new T(0,0,0);this.pressed= new T(0,0,0);this.M=!1;ba.prototype.A.call(this,a,c,b,e)};da.prototype.T=function(){this.i.frameRate(Ja.mb(60));this.input.$=0;this.C=new H(this.canvas);this.C.Tb();this.Z();this.i.start()};da.prototype.hb=function(){this.C.screen(this.i.width,this.i.height)};da.prototype.Z=function(){this.w=new ma;this.w.Y.p.z=2.5;this.w.Y.p.y=-1;var a=this.o,c=this.w.Y.p;a.x=c.x;a.y=c.y;a.z=c.z;this.w.sa=1;a=[];for(c=0;30>c;){var b=c++;a.push([]);for(var e=0;30>e;){var f=e++,d=Math.min(f+b,f+(29-b));d=this.w.ba(new T(.15* (b-14.5),1.5,.15*f),0==d?0:1==d?.3:2==d?.6:1);a[b].push(d);d.dc=0==b||29==b||0==f||29==f;d.N.y+=d.V*(Math.random()-.5)*.1}}for(c=0;30>c;)for(b=c++,e=0;30>e;)f=e++,0f&&this.w.i.push(new ja(a[b][f],a[b-1][f+1])),1b&&(c=Math.sqrt(f*f+d*d+a*a),0a;){++a;c=0;for(b=this.v;ch.x*g.x+h.y*g.y+h.z*g.z?(this.l.push([b,e,d]),this.l.push([b,d,f])):(this.l.push([b,e,f]),this.l.push([e,d,f]));a=0;for(c=this.h;aK*K+L*L+E*E||(E=J.p,K=E.x-e.x,L=E.y-e.y,E=E.z-e.z,.09>1)%b>>1^((c>>1)/b|0)>>1)&1)?(a.ka=1,a.ja=1,a.ia=1):(a.ka=.4,a.ja=.4,a.ia=.4);a.pa=1;var g=d[0],h=d[1],k=d[2];d=g.p;var l=h.p,t=k.p;g=g.n;h=h.n;k=k.n;a.J=g.x;a.K=g.y;a.L=g.z;a.m(d.x,d.y,d.z);a.J=h.x;a.K=h.y;a.L=h.z;a.m(l.x,l.y,l.z);a.J=k.x;a.K=k.y;a.L=k.z;a.m(t.x,t.y,t.z);a.J=-g.x;a.K=-g.y;a.L=-g.z;a.m(d.x,d.y,d.z);a.J=-k.x;a.K=-k.y;a.L=-k.z;a.m(t.x,t.y,t.z);a.J=-h.x;a.K=-h.y;a.L=-h.z;a.m(l.x,l.y,l.z);++c}a.wa();a.gb();if(1!=a.S)throw Error("begin scene before setting lights"); a.R=0;a.va(4);a.ka=0;a.ja=0;a.ia=0;a.pa=1;c=0;for(b=this.l;c"; var b=typeof a;"function"==b&&(a.I||a.tb)&&(b="object");switch(b){case "function":return"";case "object":if(a.ta){var e=Ha[a.ta].Pa[a.ra];b=e.Ha;if(e.ub){c+="\t";var f=[],d=0;for(e=e.ub;d.5*this.h;){c=this.update;if(ha.h)try{c()}catch(e){c=X.h(e),window.alert(ca.h(c))}else c(); c=!0;this.i+=this.h;var b=Date.now();if(b-a>.75*this.h){this.i 0.0 ? normalize(v) : vec3(0);\n\t\t}\n\n\t\tvoid main() {\n\t\t\tif (numLights == 0) {\n\t\t\t\tgl_FragColor = vColor;\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tvec3 eye = safeNormalize(vPosition);\n\t\t\tvec3 n = safeNormalize(vNormal);\n\t\t\t\n\t\t\tvec3 color = vColor.xyz;\n\t\t\tvec3 ambientTotal = vec3(0);\n\t\t\tvec3 diffuseTotal = vec3(0);\n\t\t\tvec3 specularTotal = vec3(0);\n\t\t\tvec3 emissionTotal = color * emission;\n\n\t\t\tif (!gl_FrontFacing) n = -n;\n\n\t\t\tfor (int i = 0; i < 8; i++) {\n\t\t\t\tif (i == numLights) break;\n\t\t\t\tvec4 lp = lightPositions[i];\n\t\t\t\tvec3 lc = lightColors[i];\n\t\t\t\tvec3 ln = lightNormals[i];\n\t\t\t\tbool amb = lp.w == 0.0 && dot(ln, ln) == 0.0;\n\t\t\t\tbool dir = lp.w == 0.0;\n\t\t\t\tif (amb) {\n\t\t\t\t\tambientTotal += lc * color * ambient;\n\t\t\t\t} else {\n\t\t\t\t\tif (!dir) {\n\t\t\t\t\t\tln = safeNormalize(vPosition - lp.xyz);\n\t\t\t\t\t\t// TODO: spot light\n\t\t\t\t\t}\n\t\t\t\t\tfloat ldot = -dot(ln, n);\n\t\t\t\t\tif (ldot < 0.0) ldot = 0.0;\n\t\t\t\t\tdiffuseTotal += lc * color * ldot * diffuse;\n\t\t\t\t\tif (ldot > 0.0) {\n\t\t\t\t\t\tvec3 reflEye = eye - 2.0 * n * dot(eye, n);\n\t\t\t\t\t\tfloat rdot = -dot(reflEye, ln);\n\t\t\t\t\t\tif (rdot < 0.0) rdot = 0.0;\n\t\t\t\t\t\tspecularTotal += lc * pow(rdot, shininess) * specular;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t\tgl_FragColor = vec4(ambientTotal + diffuseTotal + specularTotal + emissionTotal, vColor.w);\n\t\t}\n\t"; a.la=!1;a=this.Ka;a.map=new oa;a.j.shaderSource(a.h,a.o);a.j.compileShader(a.h);a.j.getShaderParameter(a.h,35713)||window.alert(ca.h(a.j.getShaderInfoLog(a.h)+"\nsource:\n"+a.o));a.j.shaderSource(a.i,a.l);a.j.compileShader(a.i);a.j.getShaderParameter(a.i,35713)||window.alert(ca.h(a.j.getShaderInfoLog(a.i)+"\nsource:\n"+a.l));a.j.attachShader(a.G,a.h);a.j.attachShader(a.G,a.i);a.j.linkProgram(a.G);a.j.getProgramParameter(a.G,35714)?a.la=!0:m.console.log("link failed: "+a.j.getProgramInfoLog(a.G)); a=this.La=new Y(this.j);a.o="\n\t\tattribute vec4 position;\n\t\tattribute vec4 color;\n\t\tattribute vec3 normal;\n\t\tattribute vec2 texCoord;\n\n\t\tuniform mat4 transform;\n\t\tuniform mat4 modelview;\n\t\tuniform mat3 normalMatrix;\n\n\t\tvarying vec4 vColor;\n\t\tvarying vec3 vPosition;\n\t\tvarying vec3 vNormal;\n\t\tvarying vec2 vTexCoord;\n\n\t\tvoid main() {\n\t\t\tgl_Position = transform * position;\n\n\t\t\tvColor = color;\n\t\t\tvPosition = (modelview * position).xyz;\n\t\t\tvNormal = normalMatrix * normal;\n\t\t\tvTexCoord = texCoord;\n\t\t}\n\t"; a.la=!1;a=this.La;a.l="\n\t\tprecision highp float;\n\t\tuniform sampler2D texture;\n\t\tvarying vec4 vColor;\n\t\tvarying vec3 vPosition;\n\t\tvarying vec3 vNormal;\n\t\tvarying vec2 vTexCoord;\n\t\tuniform float ambient;\n\t\tuniform float diffuse;\n\t\tuniform float specular;\n\t\tuniform float shininess;\n\t\tuniform float emission;\n\t\tuniform int numLights;\n\t\tuniform vec4 lightPositions[8];\n\t\tuniform vec3 lightColors[8];\n\t\tuniform vec3 lightNormals[8];\n\n\t\tvec3 safeNormalize(vec3 v) {\n\t\t\treturn dot(v, v) > 0.0 ? normalize(v) : vec3(0);\n\t\t}\n\n\t\tvoid main() {\n\t\t\tvec4 texMulColor = texture2D(texture, vTexCoord) * vColor;\n\t\t\tif (numLights == 0) {\n\t\t\t\tgl_FragColor = texMulColor;\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tvec3 eye = safeNormalize(vPosition);\n\t\t\tvec3 n = safeNormalize(vNormal);\n\t\t\tvec3 color = texMulColor.xyz;\n\t\t\tvec3 ambientTotal = vec3(0);\n\t\t\tvec3 diffuseTotal = vec3(0);\n\t\t\tvec3 specularTotal = vec3(0);\n\t\t\tvec3 emissionTotal = color * emission;\n\n\t\t\tif (!gl_FrontFacing) n = -n;\n\n\t\t\tfor (int i = 0; i < 8; i++) {\n\t\t\t\tif (i == numLights) break;\n\t\t\t\tvec4 lp = lightPositions[i];\n\t\t\t\tvec3 lc = lightColors[i];\n\t\t\t\tvec3 ln = lightNormals[i];\n\t\t\t\tbool amb = lp.w == 0.0 && dot(ln, ln) == 0.0;\n\t\t\t\tbool dir = lp.w == 0.0;\n\t\t\t\tif (amb) {\n\t\t\t\t\tambientTotal += lc * color * ambient;\n\t\t\t\t} else {\n\t\t\t\t\tif (!dir) {\n\t\t\t\t\t\tln = safeNormalize(vPosition - lp.xyz);\n\t\t\t\t\t\t// TODO: spot light\n\t\t\t\t\t}\n\t\t\t\t\tfloat ldot = -dot(ln, n);\n\t\t\t\t\tif (ldot < 0.0) ldot = 0.0;\n\t\t\t\t\tdiffuseTotal += lc * color * ldot * diffuse;\n\t\t\t\t\tif (ldot > 0.0) {\n\t\t\t\t\t\tvec3 reflEye = eye - 2.0 * n * dot(eye, n);\n\t\t\t\t\t\tfloat rdot = -dot(reflEye, ln);\n\t\t\t\t\t\tif (rdot < 0.0) rdot = 0.0;\n\t\t\t\t\t\tspecularTotal += lc * pow(rdot, shininess) * specular;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t\tgl_FragColor = vec4(ambientTotal + diffuseTotal + specularTotal + emissionTotal, texMulColor.w);\n\t\t}\n\t"; a.la=!1;a=this.La;a.map=new oa;a.j.shaderSource(a.h,a.o);a.j.compileShader(a.h);a.j.getShaderParameter(a.h,35713)||window.alert(ca.h(a.j.getShaderInfoLog(a.h)+"\nsource:\n"+a.o));a.j.shaderSource(a.i,a.l);a.j.compileShader(a.i);a.j.getShaderParameter(a.i,35713)||window.alert(ca.h(a.j.getShaderInfoLog(a.i)+"\nsource:\n"+a.l));a.j.attachShader(a.G,a.h);a.j.attachShader(a.G,a.i);a.j.linkProgram(a.G);a.j.getProgramParameter(a.G,35714)?a.la=!0:m.console.log("link failed: "+a.j.getProgramInfoLog(a.G)); this.nb=null};H.prototype.Ub=function(){this.Z=new r(this.j,"position",3);this.M=new r(this.j,"color",4);this.T=new r(this.j,"normal",3);this.Ga=new r(this.j,"texCoord",2);this.Ma=new Tb(this.j)};H.prototype.Rb=function(){return null!=this.nb?this.nb:null!=this.h?this.La:this.Ka};H.prototype.screen=function(a,c){this.Va=a;this.Oa=c;this.sb();this.Ua=a=Math.PI/3;this.qa.perspective(a,this.Va/this.Oa,.1,1E4)};H.prototype.viewport=function(a,c,b,e){this.j.viewport(a,this.canvas.height-e-c,b,e)};H.prototype.sb= function(){this.j.viewport(0,0,this.canvas.width,this.canvas.height)};H.prototype.gb=function(){this.ac=this.Zb=1;this.$a=0;this.cc=10;this.bc=0};H.prototype.$b=function(){if(0!=this.S)throw Error("scene already begun");this.S=!0;this.B.qc();this.R=0;this.h=null;this.pa=this.ia=this.ja=this.ka=1;this.o=this.l=this.L=this.K=this.J=0;this.gb();this.Xa||(this.ob=.5*this.Va,this.pb=.5*this.Oa,this.Sb=-this.Oa/(2*Math.tan(.5*this.Ua)),this.H.Kb(this.ob,this.pb,this.Sb,this.ob,this.pb,0,0,-1,0))};H.prototype.ec= function(){if(1!=this.S)throw Error("scene already ended");this.S=!1;this.j.flush()};H.prototype.clear=function(a,c,b,e){null==e&&(e=1);if(1!=this.S)throw Error("begin scene before clear scene");this.j.clearColor(a,c,b,e);this.j.clearDepth(1);this.j.clear(16640)};H.prototype.createShader=function(a,c){var b=new Y(this.j);b.o=a;b.l=c;b.la=!1;b.map=new oa;b.j.shaderSource(b.h,b.o);b.j.compileShader(b.h);b.j.getShaderParameter(b.h,35713)||window.alert(ca.h(b.j.getShaderInfoLog(b.h)+"\nsource:\n"+b.o)); b.j.shaderSource(b.i,b.l);b.j.compileShader(b.i);b.j.getShaderParameter(b.i,35713)||window.alert(ca.h(b.j.getShaderInfoLog(b.i)+"\nsource:\n"+b.l));b.j.attachShader(b.G,b.h);b.j.attachShader(b.G,b.i);b.j.linkProgram(b.G);b.j.getProgramParameter(b.G,35714)?b.la=!0:m.console.log("link failed: "+b.j.getProgramInfoLog(b.G));return b};H.prototype.createTexture=function(a,c,b){null==b&&(b=5121);var e=new w(this.j);e.Sa(a,c,b);return e};H.prototype.fb=function(){if(1008this.v)throw Error("cannot pop matrix");this.B.g[15]=this.A[--this.v];this.B.g[14]=this.A[--this.v];this.B.g[13]=this.A[--this.v];this.B.g[12]=this.A[--this.v];this.B.g[11]=this.A[--this.v];this.B.g[10]=this.A[--this.v];this.B.g[9]=this.A[--this.v];this.B.g[8]=this.A[--this.v];this.B.g[7]=this.A[--this.v];this.B.g[6]=this.A[--this.v];this.B.g[5]=this.A[--this.v];this.B.g[4]=this.A[--this.v];this.B.g[3]=this.A[--this.v];this.B.g[2]= this.A[--this.v];this.B.g[1]=this.A[--this.v];this.B.g[0]=this.A[--this.v]};H.prototype.transform=function(a,c,b,e,f,d,g,h,k,l,t,q,v,z,x,I){this.B.Yb(a,c,b,e,f,d,g,h,k,l,t,q,v,z,x,I)};H.prototype.perspective=function(a,c,b){null==a&&(a=Math.PI/3);null==c&&(c=.1);null==b&&(b=1E4);this.Ua=a;this.qa.perspective(a,this.Va/this.Oa,c,b)};H.prototype.va=function(a){if(1!=this.S)throw Error("begin scene before begin shape");this.hc=a;this.rb=0;this.Z.length=0;this.M.length=0;this.T.length=0;this.Ga.length= 0;this.Ma.length=0};H.prototype.image=function(a,c,b,e,f,d,g,h,k){var l=this.h,t=this.i;this.h=a;this.i=0;this.va(5);this.K=this.J=0;this.L=-1;a=c;var q=b;if(1!=this.i&&null==this.h)throw Error("set texture before calling texCoord when texture mode is not Normal");switch(this.i){case 0:a=c*this.h.D,q=b*this.h.F}this.l=a;this.o=1-q;this.m(d,g,0);a=c;q=b+f;if(1!=this.i&&null==this.h)throw Error("set texture before calling texCoord when texture mode is not Normal");switch(this.i){case 0:a=c*this.h.D, q*=this.h.F}this.l=a;this.o=1-q;this.m(d,g+k,0);a=c+e;q=b;if(1!=this.i&&null==this.h)throw Error("set texture before calling texCoord when texture mode is not Normal");switch(this.i){case 0:a*=this.h.D,q=b*this.h.F}this.l=a;this.o=1-q;this.m(d+h,g,0);c+=e;b+=f;if(1!=this.i&&null==this.h)throw Error("set texture before calling texCoord when texture mode is not Normal");switch(this.i){case 0:c*=this.h.D,b*=this.h.F}this.l=c;this.o=1-b;this.m(d+h,g+k,0);this.wa();this.h=l;this.i=t};H.prototype.kc=function(){this.P.length= 0;this.P.push(new T(0,1,0));for(var a=1;15>a;)for(var c=a++/16*Math.PI,b=0;32>b;){var e=b++/32*Math.PI*2;this.P.push(new T(Math.sin(c)*Math.cos(e),Math.cos(c),-Math.sin(c)*Math.sin(e)))}this.P.push(new T(0,-1,0));for(a=this.ba.length=0;32>a;)c=a++,this.ba.push([0,c+1,(c+1)%32+1]),this.ba.push([449,449-(c+1),449-((c+1)%32+1)]);for(a=1;14>a;)for(c=1+32*(a++-1),b=c+32,e=0;32>e;){var f=e++,d=c+f,g=b+(f+1)%32;this.ba.push([d,b+f,g]);this.ba.push([d,g,c+(f+1)%32])}};H.prototype.Mb=function(a){var c=this.h; this.h=null;this.va(4);for(var b=0,e=this.ba;b>1;e|=e>>2;e|=e>>4;e|=e>>8;a==(e|e>>16)+1?(e=c-1,e|=e>>1,e|=e>>2,e|=e>>4,e|=e>>8,e=c!=(e|e>>16)+1):e=!0;this.o=e;this.D=1/a;this.F=1/ c;this.j.bindTexture(3553,this.fa);this.j.texImage2D(3553,0,6408,a,c,0,6408,b,null);this.j.bindTexture(3553,null);this.h=a=this.h;this.j.bindTexture(3553,this.fa);switch(a){case 9728:this.j.texParameteri(3553,10240,9728);this.j.texParameteri(3553,10241,9728);break;case 9729:this.j.texParameteri(3553,10240,9729),this.j.texParameteri(3553,10241,9729)}this.j.bindTexture(3553,null);a=this.i;c=this.l;if(this.o&&(33071!=a||33071!=c))throw X.i("cannot use texture wrapping in NPOT textures");this.i=a;this.l= c;this.j.bindTexture(3553,this.fa);this.j.texParameteri(3553,10242,a);this.j.texParameteri(3553,10243,c);this.j.bindTexture(3553,null);this.A()};w.prototype.load=function(a,c){this.width=a.width;this.height=a.height;this.type=c;var b=this.width;--b;b|=b>>1;b|=b>>2;b|=b>>4;b|=b>>8;this.width==(b|b>>16)+1?(b=this.height,--b,b|=b>>1,b|=b>>2,b|=b>>4,b|=b>>8,b=this.height!=(b|b>>16)+1):b=!0;this.o=b;this.D=1/this.width;this.F=1/this.height;this.j.bindTexture(3553,this.fa);this.j.texImage2D(3553,0,6408, 6408,c,a.source);this.j.bindTexture(3553,null);this.h=a=this.h;this.j.bindTexture(3553,this.fa);switch(a){case 9728:this.j.texParameteri(3553,10240,9728);this.j.texParameteri(3553,10241,9728);break;case 9729:this.j.texParameteri(3553,10240,9729),this.j.texParameteri(3553,10241,9729)}this.j.bindTexture(3553,null);a=this.i;c=this.l;if(this.o&&(33071!=a||33071!=c))throw X.i("cannot use texture wrapping in NPOT textures");this.i=a;this.l=c;this.j.bindTexture(3553,this.fa);this.j.texParameteri(3553,10242, a);this.j.texParameteri(3553,10243,c);this.j.bindTexture(3553,null);this.A()};w.prototype.A=function(){this.j.bindRenderbuffer(36161,this.v);this.j.renderbufferStorage(36161,33189,this.width,this.height);this.j.bindRenderbuffer(36161,null);this.j.bindFramebuffer(36160,this.M);this.j.framebufferRenderbuffer(36160,36096,36161,this.v);this.j.framebufferTexture2D(36160,36064,3553,this.fa,0);this.j.bindFramebuffer(36160,null)};w.I=!0;r.I=!0;u.i=function(a){return-1==u.l.indexOf(a)?null:a};M.prototype.i= function(a,c,b,e){function f(k){k.cancelable&&k.preventDefault();k=k.changedTouches;for(var l=0,t=k.length;l

Cloth Simulation